Metopic craniosynostosis. Children with metopic, unicoronal or lambdoid synostosis were much more likely to have a learning problem than children with the most common form of single-suture craniosynostosis – sagittal synostosis. This type affects the metopic suture, which runs from the top of the head down the middle of the forehead to the bridge of the nose. Hum Mol Genet. 2009 Sep. 20(5):1439-44. . Treatment involves releasing the suture and expanding and rounding out the upper face, forehead and skull. Object. J Craniofac Surg. Metopic craniosynostosis is a type of non-syndromic craniosynostosis that occurs when the metopic suture fuses before birth. The metopic suture begins at the nose and continues superiorly to meet the sagittal suture. The use of sagittal springs with strip craniectomy may be recommended for sagittal synostosis if the child is younger than 5 months at the time of initial surgery. Children with operated metopic synostosis performed significantly worse on measures of motor functioning (g w = −.45), visuospatial skills (g w = −.32), attention (g w = −.50), executive functioning (g w = −.36), arithmetic ability (g w = −.37), and behavior (g w = −.34). 2010 May 1. The purpose of this study was twofold: first, to assess the degree of developmental, educational, and behavioral problems in patients with nonsyndromic trigonocephaly and second, to establish whether patients with mild degrees of trigonocephaly had a lower frequency of such problems. What is metopic synostosis? ... Study how the condition affects learning and behavior; ... Fronto-orbital surgery for metopic and unilateral coronal synostosis. Miraoui H, Ringe J, Haupl T, Marie PJ. Metopic synostosis is presently the second most common form of craniosynostosis, accounting for 19% to 28% of cases 53–55 and having a prevalence of 0.9 to 2.3 per 10 000 live births. Increased EFG- and PDGFalpha-receptor signaling by mutant FGF-receptor 2 contributes to osteoblast dysfunction in Apert craniosynostosis. Surgical therapy for true metopic synostosis involves a fronto-orbital advancement which allows for widening the skull at the temporal fossa. Children with metopic, unicoronal and lambdoid synostosis tended to score lower on most measures than those with sagittal fusion (P<.001 to .82). Craniosynostosis is when one or more of the special seams (sutures) in a baby's skull close earlier than normal. Metopic craniosynostosis results in a narrow, triangular forehead with pinching of the temples laterally. This corrects the abnormal triangular shape of the forehead and increases the intracranial space in the anterior fossa. This page from Great Ormond Street Hospital (GOSH) explains the causes, symptoms and treatment of metopic craniosynostosis (also … Variations of endoscopic and open repair of metopic craniosynostosis. 19(9):1678-89. . 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